九龙江北溪流域藻类暴发回顾及应急调度研究
2021-07-25陈辉



摘要:九龙江北溪下游是漳州、厦门地区主要饮用水源地。近年来,随着全球变暖以及各类污水排放量增加,该流域多次发生的水华事件,说明九龙江的水生态环境遭到破坏。本文通过回顾性研究藻类生长和流速的关系,提出了通过白沙水库放水,提高流域流速来抑制藻类生长的措施,控制藻类水华,保障流域供水安全。
关键词:九龙江北溪;水库;藻类;水华;流速;应急调度
中图分类号:X820 文献标识码:A 文章编号:2095-672X(2021)01-0054-04
DOI.10.16647/j.cnki.cn15-1369/X.2021.01.008
Review and emergency dispatch of algae outbreak in North Creek of Jiulong River
Chen Hui
(Fujian Provincial Investigation, Design & Research Institute of Water Conservancy & Hydropower, Fuzhou Fujian 350000, China)
Abstract: The lower reaches of the north creek of Jiulong River are the main drinking water sources in Zhangzhou and Xiamen. With global warming and sewage discharge, water blooms have occurred many times in recent years, indicating that the water ecological environment of Jiulong River has been destroyed. Based on the retrospective study of the relationship between algae growth and water flow rate, this paper puts forward the measures to inhibit algae growth by releasing water from Baisha Reservoir and increasing the water flow rate, to control algae bloom and to ensure the safety of water supply in the basin.
Key words: North Creek of Jiulong River; Reservior; Algae; Water bloom; Water flow rate; Emergency dispatch
1 九龙江北溪概况
九龙江北溪河长272km,流域面积9640km2,涉及龙岩市的连城县、新罗区、上杭县、漳平市;漳州市的华安县,长泰县、南靖县、芗城区、龙文区、龙海市等,而作为漳州、厦门地区主要饮用水来源地的江东库区位于北溪下游。
北溪上游万安水库、白沙调节库容两个水库调节库容之和为2.78亿m3,两个水库可以起到一定的蓄丰补枯作用。九龙江北溪干流十级开发,即:溪仔口、华口、小杞、西陂、绵良、华安和红旗山、罗溪、龙头山、天宫、利水。北溪干流的梯级电站均属日调节电站,其水量调节能力十分有限。
2 藻类暴发回顾性评价
九龙江北溪干流河段曾多次發生过藻类水华现象。2009年1月,北溪漳平溪仔口以下河段均发生不同程度的甲藻水华现象,至3月6日水质才逐渐平稳。2011年8月,北溪干流漳平华寮大桥至华口坝址处再一次发生水华。2013年3月中旬,江东库区水面出现大面积藻类漂浮,藻类优势种以绿藻、硅藻为主,3月20日水质逐渐平稳。2017年8月,北溪上游发生疑似甲藻现象,经检测藻类优势种为隐藻。……
